拼写

36)

1. Lisance
2. Lisence
3. Lisense
4. 许可

37)

1. Pronounciation
2. Pronunciation
3. Pronanciation
4. Pronunciatioan

38)

1. Knowlage
2. Knowladge
3. Knowlege
4. 知识

39)

1. 维护
2. Maintanance
3. Maintenence
4. Meintenance

40)

1. Vaccume
2. Vacume
3. Vacuum
4. Vacum